// Copyright (C) 2002-2008 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __C_MEMORY_READ_FILE_H_INCLUDED__
#define __C_MEMORY_READ_FILE_H_INCLUDED__

#include <string>

typedef unsigned int u32;
typedef int s32;

using namespace std;

namespace io
{
	class CMemoryFile;

	CMemoryFile* createMemoryReadFile(void* memory, long size, 
		const string& fileName, bool deleteMemoryWhenDropped);
	/*!
		Class for reading and writing from memory.
	*/
	class CMemoryFile
	{
	public:

		//! Constructor
		CMemoryFile(void* memory, long len, const string& fileName, bool deleteMemoryWhenDropped);

		//! Destructor
		virtual ~CMemoryFile();

		//! returns how much was read
		virtual s32 read(void* buffer, u32 sizeToRead);

		//! returns how much was written
		virtual s32 write(const void* buffer, u32 sizeToWrite);

		//! changes position in file, returns true if successful
		virtual bool seek(long finalPos, bool relativeMovement = false);

		//! returns size of file
		virtual long getSize() const;

		//! returns where in the file we are.
		virtual long getPos() const;

		//! returns name of file
		virtual const string& getFileName() const;

	private:

		void *Buffer;
		long Len;
		long Pos;
		string Filename;
		bool deleteMemoryWhenDropped;
	};

} // end namespace io

#endif

